PDF export of contributions is not sorted

[stefanritt]

Describe the bug
When contributions are exported as a PDF, they are not sorted.

To Reproduce

• Go to https://indico.cern.ch/event/727938/manage/contributions/
• Select all contributions (takes some time!)
• Click Export / PDF
• The resulting file is not sorted by ID, nor by Title

Expected behavior

• Sorted by ID or by Title

Additional context

• Export as XLSX is sorted correctly by ID
• Export as CSV is sorted correctly by ID

[ThiefMaster]

This is fixed now (and deployed on the CERN instance). It will also be included in the 2.2 release that's coming out soon.

The contributions are now in the same order as in the displayed list, so you can use the client-side sorting to determine which order they get in the PDF.